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Effect of rate and time of nitrogen application on grain yield and yield components in spring safflower (Carthamus tinctorious L.)
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Reza Soleimani   |
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Abstract: (4548 Views) |
| This experiment was carried out for evaluation of the effect of rate and time of nitrogen application on grain yield and yield components in spring safflower in Shirvan-Chardavol in Ilam during 2002-2005 cropping seasons. Experimental treatments were arranged as factorial in complete randomized block design with three replications. Nitrogen rates (50, 75, 100, 125 and 150 Kg.ha-1) and split application of nitrogen in three levels (first split: 50% : 50% ratio at pre-planting and late rosett, second split: 50% : 50% ratio at preplanting and early flowering and third split: one-third : one-third : one-third ratio at pre-planting, late rosett and early flowering). Combined analysis of variance indicated that interaction of nitrogen rate × split application was significant (p<0.05) on grain yield. Mean comparison showed that 100 Kg.ha-1 of nitrogen with triple splitting application at pre-planting, late rosett and early flowering stages produced higher grain yield (2752 Kg.ha-1). This was achieved due to increase in head/m2 (240 heads), grain/head (36.3 grains), and 1000 grain weight (34.4 g). Application of 100 kg.ha-1 nitrogen and its triple splitting produced the highest oil yield (755 Kg.ha-1). |
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| Keywords: Safflower, Nitrogen, Grain yield, Yield components, Head, Oil yield |
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Full-Text [PDF 2935 kb]
(1464 Downloads)
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Type of Study: Scientific & Research |
Subject:
Special
Received: 2015/02/23 | Accepted: 2015/02/23 | Published: 2015/02/23
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